une petite modélisation d'un banc de poisson
je la trouve tres realiste (mais pas esthetique)
la version 3D devrait suivre
Code : Tout sélectionner
; mini demo 2D - banc de poisson - Pf Shadoko - 2023
ExamineDesktops()
Define i,j,ex=DesktopWidth(0),ey=DesktopHeight(0),ex2=ex/2,ey2=ey/2
Define ns=20,h=64,l=8,n=200
InitSprite():InitKeyboard():InitMouse()
OpenWindow(0, 0, 0, ex,ey, "", #PB_Window_BorderLess):OpenWindowedScreen(WindowID(0), 0, 0, ex,ey, 0, 0, 0)
For i=1 To ns
CreateSprite(i,l,h,#PB_Sprite_AlphaBlending)
StartDrawing(SpriteOutput(i))
DrawingMode(#PB_2DDrawing_AllChannels)
Ellipse(l/2, h*0.4, l/2,h*0.4,RGBA(64+Random(127),64+Random(127),64+Random(127),255))
LineXY(l/2,h*0.7,l/2,h,$ffffffff)
Ellipse(l*0.2,h*0.1,1,2,$ffffffff)
Ellipse (l*0.8,h*0.1,1,2,$ffffffff)
StopDrawing()
Next
Procedure.f POM(v.f)
ProcedureReturn (Random(v*1000)-v*500)/500
EndProcedure
Structure f2
x.f
y.f
EndStructure
Procedure f2(*p.f2,x.f,y.f)
*p\x=x
*p\y=y
EndProcedure
Procedure add2d(*p.f2,*p1.f2,*p2.f2)
*p\x=*p1\x+*p2\x
*p\y=*p1\y+*p2\y
EndProcedure
Procedure sub2D(*p.f2,*p1.f2,*p2.f2)
*p\x=*p1\x-*p2\x
*p\y=*p1\y-*p2\y
EndProcedure
Procedure.f lng2D(*v.f2)
ProcedureReturn Sqr(*V\x * *V\x + *V\y * *V\y)
EndProcedure
Procedure norme2d(*p.f2,lg.f=1)
Protected l.f=lng2d(*p)/lg
*p\x/l
*p\y/l
EndProcedure
Structure spoisson
p.f2 ;position
v.f2 ;vitesse
sprite.l
EndStructure
Dim p.spoisson(n)
For i=0 To n
With p(i)
\p\x=Random(ex)
\p\y=Random(ey)
\v\x=pom(1)
\v\y=pom(1)
norme2d(\v,4)
\sprite=Random(ns-1)+1
EndWith
Next
Define.f f, dx,dy,a,ai, lg, align=0.1,prox=50
Define ff.f2,cc.f2,d.f2,np, *p.spoisson,centre.f2,t0=-10000
f2(centre,ex2,ey2)
Repeat
If ElapsedMilliseconds()-t0>5000:t0=ElapsedMilliseconds():f2(centre,ex2+pom(ex2/2),ey2+pom(ey2/2)):EndIf
While WindowEvent():Wend
ExamineKeyboard():ExamineMouse()
ClearScreen(RGB(0,0,0))
For j=0 To n
*p=p(j):np=0
f2(ff,pom(0.5),pom(0.5))
For i=0 To n:If i=j:Continue:EndIf
With p(i)
sub2d(d,\p,*p)
lg=lng2d(d):If lg>prox:Continue:EndIf
f=100/(lg*lg) - 4000/(lg*lg*lg); attirance - repulsion
If IsNAN(f):Continue:EndIf
ff\x+d\x*f+\v\x*align
ff\y+d\y*f+\v\y*align
np+1
EndWith
Next
sub2d(cc,*p\p,centre):norme2d(cc,-0.1):add2d(*p\v,*p\v,cc)
If np:norme2d(ff,0.5):add2d(*p\v,*p\v,ff):EndIf
norme2d(*p\v,4)
add2d(*p\p,*p\p,*p\v)
Next
a+0.2
For i=0 To n:ai=a+i
With p(i)
RotateSprite(\sprite,Degree(ATan2(-\v\y,\v\x))+Sin(ai)*10,0)
DisplayTransparentSprite(\sprite,\p\x-l/2,\p\y-h/2,255)
EndWith
Next
FlipBuffers()
Until KeyboardPushed(#PB_Key_Escape) Or MouseButton(3)
